Radio resource control-service data unit reception

Abstract

A method for processing a received communication which includes periodic transmissions of a set of information segments. A first transmission of the set of information segments is received and processed to identify each of the segments as valid or invalid. The valid segments of the first set are then stored. Where all segments of the set are not stored, subsequent transmissions of the set of information segments are received and only those segments not previously stored are processed to identify each such segment as valid or invalid. The valid segments so identified are then stored. Subsequent transmissions are repeatedly received unless all segments of the set have been stored.

Description

BACKGROUNDThe Universal Mobile Telecommunications Systems (UMTS) network architecture, illustrated in FIG. 1, includes a core network (CN) 2, a UMTS Terrestrial Radio Access Network (UTRAN) 3, and at least one User Equipment (UE) 18, (only one UE 18 being shown for simplicity). The two general interfaces are the Iu interface between the UTRAN and the core network as well as the radio interface Uu between the UTRAN and the UE.The UTRAN consists of several Radio Network Subsystems (RNSs) 10, 11. They can be interconnected by the lur interface. Each RNS 10, 11 is divided into a Radio Network Controller (RNC) 12, 13 and several base stations (Node Bs) 14-17. The Node Bs 14-17 are connected to the RNCs 12, 13 by the lub interface. One Node B 14-17 can serve one or multiple cells.The UTRAN 3 supports both FDD mode and TDD mode on the radio interface. For both modes, the same network architecture and the same protocols are used.Communication between the Node Bs 14-17 and the UEs 18 over th...

AI Technical Summary

Benefits of technology

One advantage of the present invention is that the successful RRC-SDU reception time, or (latency), is significantly reduced to the latency associated with the targeted error rate of the transmission of individual TBs between the UE 18 and the UTRAN 3, independent of the size of a RRC-SDU. Reduced reception latency improves the performance of UE functions associated with acquisition of system information such as faster cell search, reduced handover transmission break period, faster establishment of RAN connections and transitions between UE states.

Problems solved by technology

However, when an RRC-SDU is transported in the transparent or unacknowledged modes, the RLC and MAC layers of the receiving side are not aware of the RRC-SDU.

Additionally, to maintain proper performance of these system functions, SIB repetition rates may have to be increased to compensate for failed transmissions, which reduces radio resource efficiency and utilization.

The first area is in the latency of proper / correct reception, which results in reduced performance of system functions requiring system information and or increased reception, thereby reducing radio resource efficiency.

The second is when the UE L1 is required to repeatedly receive, decode and process all TBs in the RRC-SDU each time there is an error, this results in high processing and battery costs.

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